Bonding-pin.



F.0.LAVARACK- BONDING PN.

APPLICATION FILED 0GT.22, 1913.

1,097,340, Patented May 19, 1914.

UNITED sTATEs PATENT oErroE.

FREDERICK C. LAVARACK, F 0R'NGE, NEW JERSEY.

BoNDING-PIN.

Specication of Letters Patent. i 4 Patented Eday 19, 21914.

Application med october 22, 1913. 1 seria'ino. 796,715.

' To all whom t may concern.'

rails,.to more securely hold the` bond-wires -Be it known that I, FREDERICK C. I JAvA- RACK, a subject of Great Britain, 4res1d1ng.y

at Orange, in the county of Essex and State,

of New Jersey, have invented an Improvement in Bonding-Pins, of which the following is a specification.

This invention relates-to bonding-pins for 'the attachment of bond-wires to rails,- and has for its object the construction of an improved form of bonding-pin adapted forattaching the ends of two bond-wires to a rall to reducethe expense of.doublebonding the and insure a better contact.

My improved form of bonding-pin is made tapering and has wire-receiving grooves in its opposite sides of such depth that the' waist-portion between them is weakened suiliciently to admit of transverse compression of the pin, thereby to cause the'walls of the grooves to more tightly and uniformly impinge the end-portions of the bond-wires,

and thus more securely' hold them and insure a better cont-act.

Figure 1` is a longitudinal transverse sec-v tion of the end-portions of two rails, and.

bonding-pins embodying this invention driven into them, together with two bondwires. Fig. 2 is a transverse vertical section of one of the rails and bonding-pin placed therein. Fig. ,3 is a view similar to Fig. 2, the bonding-pinY vbeing driven into a hole in the rail. Fig. 4c is an enlarged sectional View, taken on the dottedv line 1 4,

Fig. 2. Fig; 5 is an enlarged sectional view, taken on the dotted line 5--5, Fig. 3. Fig. 6 is a side elevation of the bonding-pin. Fig. 7 is a longitudinal vertical section of the bonding-pin. Fig. 8 is a perspective view of the bonding-pin.

10 represents the tapering bonding-pin,

which may be made of any desired d-imen' sions and preferably has an extra taper at its smaller end-portion. lTwo wire-receiving grooves 12, 14, are extended throughout the length of said pin, which are arranged at opposite sides of it, and said grooves are or maybe formed with parallel sides and of a gradually increasing depth, in a direction from the smaller to thel larger end, so as to provide a weakened waist-portion 15 between them, throughout the length of the pin. Itis designed and intended that two bond-wires shall be arranged in the grooves 1n the pin, and the pin driven into a hole 2O in the rail 21, and when so driven the pin isl compressed transversely by reason of its weakened waist-portion', so that the walls.

of the grooves more rmlylengage the endportions of the bond-wires, and uniformly pinch said wires throughout the length of the pin, and results in the bond-wires being -more securely held, and a. better contact,

insured.

On account of the pin being made taper- 'ing the grooves are formed of a gradually receiving grooves formed-1n its oppositeA sides which are extended throughout its length, and made of adepth to provide a weak waist-portion between them, admitting of transverse compression of the pin when driven into the rail and consequent extra impingeinent of the walls of the grooves' upon the end-portions of the bond-wires, substantially as described.

2. The bonding-pin herein described .consisting of a tapering pin having two wirereceiving grooves formed in its opposite sides, throughout its'length, and of a'gradually increasing depth from the smaller to the larger-end thereof, admitting of transverse compression of the pin throughout its length when driven into the, rail to secure a uniform impingement of the bottoni ofthe grooves upon the end-portions of the bondwires, substantially as described. l

In testimony whereof,.I have signed my name to this specification, in the presence of two subscribing witnesses.

FREDERICK C. LAVARACK.

Witnesses:

' A. M. LINDENSTRUTH,

GEO. GRAF. x 

